Southwest Airlines identified the victim as one of its employees, Michael Winchester, who would have turned 52 next week.

Balderrama said the airport was ordered closed after police got a call shortly before 1 p.m. (2 p.m. ET) "of shots fired in the parking lot area of the airport." He described the shooting as "premeditated" and "not random," but he gave no other details.

Our love and support is with James and the entire Winchester family. Our heartfelt thoughts & prayers are with you.

A longtime family friend, James Harryman, acting undersheriff of McClain County, said Michael Winchester lived in the town of Washington, where he raised three daughters in addition to son.

"What I've seen of Mike, he was a family man, great guy, loved his family, loved his kids, grandkids, was always there for them and with them at ball games," Harryman told NBC station KFOR of Oklahoma City.

Corky Siemaszko

Corky Siemaszko is a senior writer at NBC News Digital.

Alex Johnson

Alex Johnson is a senior writer for NBC News covering general news, with an emphasis on explanatory journalism, data analysis, technology and religion. He is based in Los Angeles.